Watch-service recorder.



9 SHEETS-SHEET l,

PATENTED AUG. 6, 1907.

H. B. HOLMES. WATGH SERVICE 11500311311.

APPLIUATIOH FILED OGTIBO. 1905 9 SHEETS-SHEET 2.

No. 862,478. PATENTED AUG. 6, 1907.

H1 B. HOLMES.

WATCH SERVICE RECORDER. APPL;[0ATION FILE]; 001220, 1905.

'9 SHEETS-SHEET 3.

, WWW J] tym afaz'ya:

No. 862,478. PATENTEDAUG. 6,-1907.

H. B. HOLMES.

WATCH SERVIGE RECORDER. APrmqAnol FILED 001220.1905.

9 SERIES-SHEET 4.

PATENTED AUG. 6, 1907.

H. B. HOLMES. I

WATCH SERVICE RECORDER.

APPLICATION FILED 00'1.20, 1905.

9 sEBBTssHnET s.

PATENTED AUG. 6, 1907.

H. B; HOLMES. WATCH smmcs RECORDER. APPLIUATIDI FILED OOTJO, 1105.

9 BKEETS-SHBET a.

//7///// ////////////////7///fi 1m No. 862,478. PA TENTED AUG. 6, 1907. H. B. HOLMES.

WATGH SERVICE RECORDER.

APPLIUATIOH 11.00 001.20. 1905.

9 BHEETS-SHEET 7- No. 862,478,. v PATENTED AUG. 6, 1907.- H. B. nomss'.

WATCH SERVICE RECORDER. urmounox 11.51) our. 20, 1:05.

0 BKBETS-SHEET B.

' WATGH SERVICE REGORDER..

PATENTED AUG. g. 190?. H. B. HOLMES.

APPLICATION nun 00120. 1905. r

a SH-BETSSHI-ZET a.

UNITED. spurns P ENT. OFFICE.

HOW ARD B. HOLMES, OF PARK RIDGE,- ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

WATGIL-SERVICE RE CORDEB Specification of i etyters Patent.

Patented Aug: 6, 1907.

Application filed October 20,1905. Serial No. 283,625.

To all whom it may concern. V Be it known that I,-HoWARn B. HoLMEs. a citizen of the United States. residing at Park Ridge, inthe county of (rook and State of Illinois, have invented a certain new and useful lmprovement in Watch-Service Recorders, of which the following is a full, clear, concise, and exact description.

My invention relates to apparatus for recording the progress of a watchman as he travels over his beat and to record any delays or irregularities.

it has been customary heretofore to provide telegraph call boxes located at various stations along the heat which the watchman is expected to travel. with a telegraph register at a central Tiflice connected with the several call boxes and adapted to make a record of the signal sent from each box. This signal usually is merely the number of the particular call box which is operated; but special signals, such as fire alarms or the like, may also be transmitted. Such a system requires the supervision of an operator at the central ofiice to note, the time the signals are sent in from the different call boxes and in case of any unusual delay in receivingany signal it is usual to send out a special inspector to Iind out what the trouble is. v

T he present invention is designed to automatically make a record of each signal as it is sent in from any call box on the circuit. this record showing the exact time the signal is transmitted as Well as the number of the call box from which it is transmitted and any special.

signal which may have been sent. But more particularly this inventioncontemplates means whereby in case of unusualdelay of the watchman in sending in the signal a positive alarm is automatically given. and a Qpositive record made of the. delay.

r My invention will be described'more particularly in connection with the accompanying drawings and-the features orcornbinations which I regard as novel will be pointed out in the claims.

1n the drawings Figure 1 is a side elevation of the watch service recorder constructed in accordance with my invention. Fig. 2 is a front view thereof, the casing being removed to disclose the operating parts. Fig. 3 is a plan view also with the casing removed. Fig. 4 is an elevation looking at the opposite side from that shown in Fig. 1.

this advanc; aking place regularly under the control of suitable clock mechanism. 10 Fig. 5, but showing the parts in an alternative position. iugmechanism. the parts being illustrated in their normal position. Fig. 8 illustrates some of the parts shown in Fig. 7 in an alternative position. Fig. 9 is a detail perspective View of a cam .forming part of the mechan- Fig. 5 is a detail View showing the mechaui ism by which the record drum is advanced step'by step.

Fig. 6 is a view similar.

Fig. 7 is a detail sectional elevation of the recordism hereafter to'be described. Fig. 10 is a detail side view of an escapement wheel forming part of the mechanism which is brought into operation in case of any delay in thesending in of a signal. Fig. ll is a sectional view illustrating said. escapement wheel and its associated parts. Fig. 1.1 shows in detail a portion of the escapement mechanism. Fig. 12 is a detailperspective view of an arm which cooperates with the escapement wheel. Fig. 13 is a detail sectional view of the record drum and a portion of the mechanism for rotating'the same. Fig. 14 is a detail front view of the traveler which carries the marking device. Fig. 15 is a similar view thereof showing an alternative position.

Fig. lli is a diagram showing the watch service recorder I in association with the various electrical circuits which it controls and by which its operation is brought about.

The same letters of reference are used to designate the same parts wherever they are shown. Y

Before describing the mechanism of the particular recorder shown in the drawings, it will be well to give a brief outline of the general features of the system so that the scheme of operation may he understood, after which the particular mechanism will be explained in detail.

Referring first to the diagram, Fig. 1c, the circuit 18 extends through a number of telegraph call boxes 19 of the well known type to the central oflice where it passes through the magnet 20 of the register, the circuit also including the normally closed contacts 21, 22 which are controlled by the time operated mechanism which takes account of delays, this mechanism beingset to operate at the end of a given period, but being reset by the sending in of a signal, so that if the signals are sent in at their proper times thp contacts 21, 22 controlled by the time tmcrated mechanism will not be actuated. A source of current 23 is included in the circuit 18, and this circuit is normally closed at the various telegraph register boxes 19 so that the magnet 20 of the register atthe central oflice is normally excited. When any one of the signal boxes 19 is operated by pulling down the handle thereof in the usual manner, the circuit is opened and closed a definite number of times to tick off thefnumbcrof the box in question and also any special signal which may be sent. A marking device is operated by the armature of the magnet 20 to make'a. record of the transmitted number upon a record blank 24, which is preferably a sheet of paper mounted upon a drum 43 which is slowly rotated by clock controlled mechanism. In. F ig, 16a train of gear Whcols is shown for rotating the record drum, said train beingadvanced step by step by means of a ratchet wheel 25 arranged to be advanced by a. pawl actuated by an elcctromagut-I 20; said magnet '26 is in a local circuit. 27 which is closed at regular intervals by a clock 28, these intervals being timed so that a complete revolution of the drain 43 will mechanism.

be broughtnbout within ngivon' peri0d--iot example, i erly receivecl and recorded. st thc central office, I

tw'enty-iour-hom's. Iho mochanhm which advances the'drnm' ili also opcm'tbs the cscapomont wheel 29 whichis arranged temperate a contact operating m'm' 530; Bilild arm. is normally cnr'riedhrouml with the cscapmunt wheel 29, but upon the operation of tho-records; in receiving i1. signal sent'in from any of the b0 19" tho arm is nntomnticnlly'set' back, no will har s: be clcscrilimd. if no signitl is sent in within it given period of time, the arm 30 in cm'rieli mound until it nctuzttcs contacts 31 which control a local circuit includcontacts 2]., 2245c as to open the normally closed main circuit 18 which includes the magnet 200i the recorder, thereby causing. said magnet to actuate the recording The rccording mechanism controlled by the magnet 20 may consist of a, stylus which is adopted to be drawn across the face of thoblunk 24by means of a worm shaft 32., and 9. carrier for the stylus engaging said. worm shaft. An inked ribbon Ell, suohns atypowriter ribbon,

is introduced betwocn the end of the stylus and the face of the drum. The trawl of tho stylus will bo produced by the worm shaft 32, the magnet Zllsorving sirnply to ciiintrol the. pressure of sold stylus against the drum. As the stylus reaches the (and of its journey across the drum the cnrricrniechnnism is automatically reversed and returned to its norinul poiiition as will hereafter be described The worm slinit 32 is kopt constantly ro= toting by a momma, butl'the carrier bearing the stylus is kept nortmtllypout of engagement with tho Worm shaft, subject tlfconti'ol bytho magnet 20'. Upon the' -d.e:.inergimtion of Haiti magnet 20 the threarled csrriei bearing the stylus is brought into engagement with the rotating worm shaft 32 and moved acrossthe record blank. Anymovomonts of the armature of magnet 20 during the journey of the carricr serve only to move the stylus toward and from the record blank to print marks upon. the latter.

The ordinary tolrgrnph' cull box is arranged first to tick off its own number; after which any special numbcror signal is ti ckerl off according to the setting of tho indox of the call lJOTQ. In olccordanoo with my invontion the sending of any special signal. after tho numbt r of the box has boon transmitted will cause the sending of an :Llnrm at the control oiilce'. This may be l'n'ought about by arranging the iitylus or other part uhich is responoivo to tho nlovomonts of the mngnct to opcmto n switch contact 34 which controls a. local circuit incliniing a humor or othcr alarm dovicc 35. lo tho mcchnn" ism shown tho contact 34 is m'rztngcrl'to be opomtetl through the 'agcncy of a. lalcmlly moyztblo mil 36 which cxtcmls ulongtl'io lnti or ballot tho pzttbwnyoi tho :itylus min to be cngf'lIl by at protccting portion 37 thorool', so that ns'gthc stylus mm is movml to null fro bytlnmngm t 20 in its rosponsc to tho signal, tho rail 36 will bo moved latcrally to opomtc tbc rolny coutuct 1M. Tho mil 36 prck'crnirly cxtr-mln only along; tho lnltor portion of lilo pathway through which the Stylus lnz'tlccs its journuy so thnt tho first mow-mom's of the stylus in: rccol'iling' mcrciy tho number of tho cull box will not couso tho opcrution of the slum; 35, I i

in ortlol that tho watchman nuly know nftclf ho has o 'n-mtwi his will hm; that tho signal lino boon prop comm . czirrier provide an electromagnetic signal device at the cnllbox which is adnptcd to lie actuated by speeiai'cuz'rent sent from the oontral oflicoj and. the recorder nt the clos of its 'operntionniter recording a signal sent in is arranged to :Lctuutc owitch contacts wi1ich will apply to the circuit a source of special current adapted to actuate the signal at tho mill box, As shown in the drawing, the

chill hon may lie-provided, with a bell 37 and a spring Actuated hummer" for striking the some normally held under tension by 0. latch controlled by the armature of a The inagnct 3 8 is adapted to respond. onlyto special current from the' generator 39 at the central oiiice. Switch conflicts 40 control the connection of said gonorator 39 with the main circuit, "these contacts being arrztngctl to be sctuntel l by :1. pin 41 carried by a. rocking arm 42 which is adopted to follow the movements of the 3*. At the end of catch journey of the carrier therefore the pin 41 will be caused to actuate the contacts 40 and npply current from the generator 39 to the circuit, which current will actuate the magnet 380i the thus indicating that'the coll lmobeen reconletl.

it will be understood that tho rccorcl blank 24 may have in scale printoll thereon which may be diyidcd off in divisions of timo, as in hours and minutes. As the blank is rotated under the stylugsi by the operation of the" clock mechanism, it will be seen that any mark mode by the stylus upon tl iorecord blank will show by its relative position upon the scale the exact time at which tlioinztrk' WklBlBflElt-l.

ioming now to a description. oi the particular mechmagnet 38 which is il'icllulerl in the main circuit 18.

substation call hour. and count: the bell 3'7 to be tapped,

auism of the recorder by which the various features of operation above dcscribod may be accomplished and referring to Figs. 3, 4, 5, 6 and 13 ashet of paper constituting therecorcl blank 24 is carried by -a, rotatable drum 43 and may be fastened to the surface of said drum by a spring clip M yi hich-pztsses abross the surface of said drum in a furrow or channel therein, tho-paper being crimped in the channel. and hold tightly upon the cylinclcr underneath the clip tl. V

A gear Wheel 45 which is adopted to be driven through the agency of clock; mechanism; as will heroafter he described, is mounted upon an axis concentric with the drum 43, nnrl said drum and gear wheel may be independently rotated or they may be coupled to rotate together by nileons 0i :1. SCi:0W clamp 46. In adjusting the paper upon the drum, the drum may be re- VOlVGl freely, and when the operation of the, recorder is to'bu started, the record blank having been brought into the. desired relation to the stylus or marker, the 4 clamp 4h will be, tightened and th o drum will thereafter be: rotatable only by the c'lo'ck-tlriv'cn gear wheel 45.

shown in Fig. 5 to the position shown in Fig 6, the

Intclmt wheel 25 is uifl'vsncerl step by stopfimtl, acting threaded block 49 oted to the carrier 43" through the train of intermediate gear wheels, slowly advances the gear wheel 45 which carries the record drum 43. I

The mechanism for marking the record may be understood by reference 'to Figs. 2, 3, 7 and 8 together withthe detail views Figs.,l4 and 15 showing the mo vable stylus carrier. The worm shaft 32 extending across the register in fr0nt of the record drum is kept constantly in rotation by means of the motor 33 (Fig. l).

A guide shaft 48 extends across the machine parallel to the worm shaft 32, and the stylus carrier 43" is arranged to slide to and fro on said shafts 48 and 32. The movement of the carrier may be brought about by a carried by a hinged arm 50 attached to said carrier, said block 49 being adapted Lobe e11 gaged by the threads upon the worm shaft 32. A spring 5i may be provided for holding the hinged arm 50 in position to force the threaded block 49 into engagement with said worm shaft. Normally, however, the arm 50 is held up as shown in Fig. 7 by a lip 51 which'extends along the lower edge of the armature lever 52 of the magnet 20, said armature lever being normally held in its-attracted position. When the magnet 20 is deener gized by the opening of the circuit 18 in which it is included, the armature lever 52 is retracted by a spring 53 and withdraws the lip 51 from under the arm 50 of the carrier, so that said arm is allowed to drop and carry the threaded block 490i the carrier into engagement with the worm shaft 32. stantly rotated. the journey of the carrier across the register from left to right (Figs. begun as soon as the armature lever 52 is retracted. Subsequent vibrations of the armature during the journey of the carrier have no effect upon the movement thereof as the end of the arm rides below the lip 51. The carrier thus continues its journey toward the end of the worm shaft 32, whereupon the arm 50 is automatically disengagedfrom the worm shaft and raised above the lip 51 by means of a cam 58 carried by said worm shaft, whereupon the position by a spring actuated pivoted arm 42. arm has a sliding extension 54, the end of which is pivso that said arm follows the movement of the carrier. A coiled spring 55, shown in do[: ted lines in Fig. 2, tends to keep the arm 42 in the position shown in Fig. 2, and the movement of said carrier by the worm shaft'32 is made against the tension of said spring 55. To repeat, the purposeof the spring actuated arm 42 is to return the carrier to its normal position after the threaded block 49 has been raised from the worm shaft 32 at theend of the journey. The raising of the arm 50 carryingsaid' threaded block is brought 1 about by thecam 58 after the annature 52 has ceased 4 its vibration'and is again in the normally attracted po- "sition shown in Fig. 7, so that as the carrier is returned to its normal: position the end of the pivoted arm 50 rides along the top ofthe lip 51and so is held out of engagement with the worm shaft during the return journey. As the carrier reaohes the end of its outward journey, the pin 4]. carried th ereby engages one ofthe springs'of the switch contacts 40 to close said contacts and connect thegenerator 39 in the main circuit for the purpose of operating the signal. 37 at the call box as here fgre-explained.

The i'i'ieghanism for raising the pivoted arnr 50 to lift 2 and 3) is therefore.

carrier is returned to its normal Said Said worm shaft being coni j with the drum. if the magnet remains decncrgized.

the block 49 from the worm shaft 32 at theend of the outward journey of the carrier is illustrated in detail in Figs. 14 and 15. a lateral extension 56 which is adapted to be engaged by the cam 58. After said arm 56 is thus raised, it is adapted to rest upon the outward surface of a shell 57 associated with said cam 58, said shell serving to hold up the arm 56 until the carrier has been moved to the left a sufllci'ent distance so that. the end of the arm 50 will be again supported by the lip 5! of theatimature lever. Said lip 51 is of ,course cut away at the extreme end to allow the arm 50 to be raised, as shown in dotted lilies in Fig. 2, and the-shell 57 is for ih c purpose of holding the arm in its raised position until the carrier has moved back to a point where it will be supported by said lip. I

I Having described the operation of the carriage which bears the stylus across thc record blankjl will now proceed to describe the incchanism by which the stylus may be'causcd to print lhc marks upon the record blank to correspond with the movements of the armature lever 52 of the magnet 20. The stylus arm 59 is pivoted at (50 to the carrier 43 and the nppcr end of said stylus arm is arranged to glide lH'lM/(Pll the folds of an inked ribbon til. which is interposed bctwccn tlic'cnd of the stylus and the faccof the record drum. The ribbon may be carricd upon rollers (i2, (32 (Fig. 2) in a manner similar to that in which a lypcwriicr ribbon is supported. The record drum rolalcs very slowly. and to prevent the ribbon from covering up the rccord which is made i prcfcrably use a riblmuwhich is folded to present a comparativcly sharp edge lo the record drum. the cud of lhc stylus being cntcrcd between the folds of the ribbon. To move the stylus arm 59toward and from the record drum in. rcspouse to the movements of the-armature 'Z'of the clectronlagnct 20. i provide a. projecting tongue (33 upon the stylus arm which is adapted to slide in a channel 64 formed in the rear of thc armature levcr 552i As the urinal urc is vibrated the stylus arm will'thus be caused to follow its movements. When the armature lever is retracted the stylus arm will be pushed toward the record drum to make a mark thereon, but when the annature is attractcdas shown inFig. 7 the stylus arm. will be lifted out of contact during the entire journey of the stylus carrier across the record drum it will be seen that the slylus will merely Tnark a straight line across the record blank. but if during the journey the magnet 25 intermittently excited to vibrate the armature lever 5?. ba-ck and forth the rc- .sult Will be a broken line of a succcssicm of marks which will correspond to the in'ovcnn-nts of the armature similar to the marks produced by an ordinary telegraph registerf Thus, for example, if the call box is M5144. the mechanism of the call box will be arranged to automatically transmitthis number by'lirst breaking the cirouit once, then aftcr a pause breaking the circuit four times, and again after another pause breaking the circuit four times. The result will be that at the first breaking. of the circuit the armature lever 52 will die retracted.- causing the stylus to be pushed against the same time the pivoted arm record blank, while at the 50 is released and causes the carrier 43in bcgin its journey across the cachinc to carijy the stylus across the front of the record blank.

It will be seen that the arm 50 carries said lip.

record blank, ot a continuously rotating worm arranged to move said marking device, a magnet, on urmeture therefor normally maintaining said working device out of opcrativc adapted to disengage the marking device from said worm at the end of the journey. and spring nctuate dmechnnism for returning said marking device to itsnormal positlo'u under-inc control of solid armature.

12. In a recorder thefcpmblnatlon with a continuously rotating worm shaft, :1 mnrkingdcvice for a record blank and acerrler therefor-having :1 portion adapted to engage sold worm shaft to be moved thereby, a magnet, an armciure therefor having a lip normally hcldlng suld carrier out of engagement with said worm find adapted uponthe response of the magnet to'release said carrier, a connection between said armature and ihe marking device, whereby said nmrking-devlce responds to the vibrations ofsnid hrmuiure during its travel, means for disengaging said currler from the worm shnft at the end of the journey of said carrier, and mcans for returning said carrier to its normal position while held out of engagement wi 13. In n recorder the combination with'umerking device for :1 record blank, of n'magnet, muons controlled in the response of said 'magnet for moving: said marking de vice along said bionic, nu armature for "said magnet connrcied with said marking device to control the engagement thereof with said blank, an alarm signal, a, controlling device therefor, and means controlled by the vibration of sold marking device for actuating snid alnrm signal.

14. In a watch service system the'combination with. a recorder comprising a marking device for a record-blank, means adapted to move said marking device along the rec ord blank, :rmngnet controlling the engagement of said marking device with the record blankduring its journey, a

-circult for sold magnet. including transmitter mechanism for contmlllng said circuit, to operatesaid magnet; an

ulurin device and a'co'ntroller 36 therefor adapted to he opcrated through the 'agcncy of said mngnet during :1 definite 'n'ortion of the journey of said marking device, whereby signglls sent during said portion of the journey of sold marking device will cause an alarm signal to be indicated.

15. In a recorder the combination with a marker for 21 I rccord blank, mechanism adapted to carry sold marker along the record blank, a magnet having an armature arranged to operate said marker during its journey, a in ally movable rull I56 disposed alongside a portion of "the. pathway of said mnrker, "an alarm device controlled through the agency-of said rail in tlielaterul movement thereof, rind n portion carried by said marker adapted to engage said rail to cause the latter to follow the move ments of said marking device; whereby signals received by themngnet during a portion of the journey of the marker will be indicated by said alarm signal.

16, In "a watch service system, the combination with a circuit. including a source" of -c1'frrent extending from. a transmitter to a 'recordcmof av movable recorder mechanlaid for seldrecordcr, a magnet controlling the operation thereof included iufisaid transmitter circuit, a source of s'pecial current at the central oflice, an electromagnetic slg-- hall at the'transmitter unresponsive, to said first mentioned ,snurce of current,-but, responsive to said special current.

' sold ribbon, means for moving said stylus along in front of said record blank, the end of snid stylus gliding between the folds of the ribbon, and means for vibrating said stylus to mark the recordblnnk, substantially as setforth.

18-. The combination with -a movable arm 30. of a device adopted to be actuated-by said arm when moved agiven distance, a wheel, time controlled mechanism for rotating aid worm by said wheel, teeth carried by said wheel .adanted to engage with a portion carried by said arm to move said arm,

Smd and p or Setting said lu'm backward with relation to said wheel. i

ulloptedto be actnnted by said arni when moved to a given position, uncscn'pement. wheel 29 mounted concentrically said sockets and adapted to engage n portion carried by said teeth belng sidnpsed to be adjusted at different points vnls, means for causing relative longitudinal movement oiv said escapement wheel, to release said arm, and; spring for setting back said arm with relhtlon to. said wheel when released. g 20. The combination with apivoted arm, of wdevice adapted to be actuated by said arm when moved to a given position. a wheel adapted .to move said arm, tlmccontrolled mechnn'lsm for rotating said wheel, and a set back escup'emelit for said arm with reference to saidiwh eel controlled by the relative longitudinal movement of said wheel I i 21. lhe combination with an escepemeut wheel, of time controlled .mccllnnlsm for rotating the some, teeth mounted around the periphery of said wheel, an mm 30 mounted concentrically with said wheel and hoping 1m escapelneni' moot of said wheel and arm, a spring arranged to set back said arm with respect .to said wheel in theopcratlon of said arm when advanced n given distance; whereby the actuation of said device by said armlmay be prevented only by the operation of said'escnpexnent st definite intervals of time determined by the position of said teeth, substantially as set forth. I I D 22. In a watch service system the combination with a signal circuit, of an electromagnetic signal recorder in op reratlve relation to said circuit, a transmitter mechanism controlling said circuit to operate said recorder, 33. movable 1171 330 associated with said recorder, and time controlled mechanism for advancing said arm, a-set back esciipemcnt for. said arm operated in the response of said recorder to, u transmitted signal, a warning signal, a controlling device therefor operated-by a given advance of .said' arm, and a record controlling device adapted to be operated by a furtbcr advance ot'sald arm, substantially as described.

251. In a watch service recorder, the combination with :1 movable part andti'me-controlled mechanism for .ndvnncthe :lgcncv of sold-movable partwhen advanced a given extent; signall'reqordir mechanism, an escnpement for said movable pant 'operated' in the response ,olbsald recording lhe set-brick movement thereof sald latch being brought given point. i i

2 L. ln'a Will't'h servlce system, the combinatloh'wltn a marker or record binnk,"of'mecha:nlsrn adaptcdto carry said marker along the record blnnin means for associating said marker wlth"s:iidmechanism. a magnet controlling the engagement of sold marker with said biank' (luring the movement of sold marker, n pl! mispecini current at the central ollice for operating said signal, and o'swltch actuuted in the movement of said ngnrker for applying sold special currentio the transmit 4 texcircuit.

In witness whereof, I hereunto subscribe mv'ndme this 30th day of August A. 1).. 1 905.

riownnn nomms;

' Witnesses means for moving-skid rotnting'wheel longitudinally to re 19. The combination with a nivoted arm 210, of av device with snld e l-n1, time controlled mechanism'for continuously whiting.saidfescapement wheel, said wheel having a mum herv of sockets 11nd escupement teeth removably carried in;

said arm to move the same in the rotation 'of said wheel.-

with said teeth operated by the relative longitudinal move ing the same, an elz lsln adaptcd to be operated through,

nit for said magnet in eluding a i'ransmittelz- :1 signal at the transmitter, a source around the wheel to engage said arm at any desired interios sold escpctuent, and a device adapted to be actuated by v into action by the advance or said movablepnrt beyond a 

